The cornea is an extremely important part of your eye. A healthy cornea is essential for clear, crisp vision. Unfortunately, your cornea is susceptible to a wide array of diseases and conditions.

What is the Cornea?

Your cornea is the clear, dome-shaped surface of your eye. It is made up of several distinct layers, each with it’s own important job. The cornea is responsible for letting light into the eye, and keeping the inner parts of your eye safe from harm. The cornea plays many roles in keeping your eyes healthy.

Common Corneal Diseases

There are many diseases, conditions and injuries that can affect the health of your cornea, and in turn the rest of your eye. It is important to know about these diseases and how to look out for them. Early diagnosis and treatment of these diseases is important to maintaining vision and overall health.

Corneal Abrasion

A corneal abrasion is a scratch or scrape to the cornea, a clear round dome covering that the iris and pupil. Common causes of a corneal abrasion’s include:

– Small children accidentally poke in the eyes whoever is holding them

– Foreign matter such as dust, dirt or sand, getting stuck under the eyelid

– Something hitting or blowing into the eye, such as plant matter, sawdust, or ash

– Sport injuries

– Improperly fit or maintained contact lenses

– Rubbing your eye vigorously

Corneal abrasions are painful with most people becoming very symptomatic with a jabbing pain, profuse tearing, foreign body sensation, and sensitivity to light. Poor vision can also result if the abrasion is situated in, or near, the center of the cornea. If you experience any of the above symptoms, you should seek immediate care from Dr. Alan Mendelsohn or Dr. Nathan Klein who perform a thorough examination and then initiate treatment. When a corneal abrasion occurs, “toughing it out” is not prudent because they can lead to permanent scarring, and worse yet, infections within the cornea called a corneal ulcer with its associated potential for mild to moderate to devastating loss of vision. Be sure to call the office immediately and Dr. Mendelsohn or Dr. Klein will evaluate you as soon as possible.

Corneal Ulcers

Cornea ulcers typically occur as a painful, red eye, with mild to severe eye discharge, sensitivity to light, and increased hearing (often profuse). Additionally, there may be blurry vision, especially if the ulcer situated at, or near, the center of the cornea. This condition is caused by a localized infection, similar to an abscess. Corneal ulcers can cause permanent vision loss due to corneal scarring, or tragically, the loss of the eye if the offending microorganism gains entry into the eye. Therefore, establishing the diagnosis of a corneal ulcer and initiating therapy immediately is of paramount importance. Always call the office immediately if you have symptoms of an ulcer.  Dr. Alan Mendelsohn or Dr. Nathan Klein will valuate you ASAP. Please never delay. Alan Mendelsohn, M. D., F.A.C.S., is a cornea fellowship trained specialist from Bascom Palmer Eye Institute.

What causes corneal ulcers?

The vast majority of corneal ulcers are caused by one of four types of infections: bacterial, viral, fungal, or parasitic infections. Bacteria corner ulcers are the most prevalent type of ulcer. They are far more common in contact lens wearers, especially those individuals who utilize extended-wear lenses and those who over wear lenses by not replacing them at correct, regularly scheduled intervals. In both scenarios, over time, the contact lens develops microscopic imperfections, enabling bacteria to become adherence of the lens and precipitate a corneal ulcer. All contact lens wearers, if a red, painful eye develops, must see Dr. Mendelsohn or Dr. Klein immediately.

Herpes simplex virus (HSV-1) may cause a cold sore around the mouth, nose, or in the eye. Up to 95% of the U.S. adult population has HSV-1 though some may never experienced a cold sore. Unfortunately, herpetic eye infections tend to be recurrent. Treatment for herpes simplex eye infections/inflammations works very well and is necessary to prevent scar tissue and other associated damage. A different virus, varicella-zoster causes chickenpox, and may subsequently re-activate into shingles. Varicella zoster may lead to ocular inflammations or infections, including corneal ulcers. Treatment is necessary to prevent/minimize scar tissue and other associated damage. The sooner that you come to the office to be examined and treatment initiated, the better the visual prognosis.

Fungal corneal ulcers are relatively rare. Working in the garden, or in an agricultural setting, with the eye getting poked or plant material getting into the eye can lead to a fungal corneal ulcer. Permanent vision loss often results from fungal-induced corneal ulcers. Other risk factors include improper use of contact lenses, being immunocompromised, or prolonged steroid usage.

Parasitic cornea ulcers are extremely rare but particularly devastating in the loss of vision when they develop. Treatment is usually ineffective, therefore, prevention is of great import. The vast majority of these corneal ulcers develop in contact lens wear or falling in properly cleaning lenses. Lenses should not be cleaned with tap water nor saliva.

No matter the type of infection causing a corneal ulcer, with a red, painful eye, please call to see Dr. Alan Mendelsohn or Dr. Nathan Klein ASAP at the earliest sign of problems.

Fuch’s Dystrophy

Fuch’s Dystrophy is an eye disease in which the innermost layer of the cornea, called the endothelium, begins to deteriorate. The endothelium is responsible for keeping the cornea clear and pumping out excess fluid. Without it, the cornea begins to swell and become foggy. There is no known prevention for Fuch’s Dystrophy, and may be genetic. This condition can be improved by the use of hypertonic eye drops, which remove excess water from the cornea. Corneal transplant may also be necessary.


The cornea is usually a smooth, dome-shape. People with keratoconus have weaker, unstable corneas. This results in the cornea budging and taking on a cone-like shape. This shape can make vision very blurry. Keratoconus is a progressive disease, and does not have any known prevention. The onset of this disease usually occurs around age 16. Treatments include corneal collagen crosslinking (CXL), Intacs implants, or corneal transplant.

If you are looking for the right corneal specialist for you, be sure to contact Eye Surgeons and Consultants of Hollywood FL today!


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